Claude Haiku 4.5 vs Claude Opus 5.5
As of Oct 14, 2026, Claude Haiku 4.5 leads Claude Opus 5.5 in 0 of 7 shared categories.
Claude Haiku 4.5
#78 Best recorded rank: #78 in Abstraction (ARC), as of Oct 14, 2026.
Claude Opus 5.5
Yes. SOTA in co-SOTA in Reasoning, co-SOTA in Coding, co-SOTA in Coding › Agentic, Coding › Web dev, co-SOTA in Long context and co-SOTA in Factuality.
| Category | Claude Haiku 4.5 | Claude Opus 5.5 |
|---|---|---|
| General LLM | #104 · #104 in General LLM Margin 70.74829931972789 LMArena leaderboard dataset · Oct 13, 2026 | #2 · Near-SOTA · General LLM Margin 1.3605442176870781 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #91 · #91 in Reasoning Margin 63.013698630136986 LMArena leaderboard dataset · Oct 13, 2026 | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #109 · #109 in Science Margin — Epoch AI benchmarking hub · Oct 15, 2025 | #31 · #31 in Science Margin — Epoch AI benchmarking hub · Sep 22, 2026 |
| Coding | #— · Not enough data Margin — Scale Labs leaderboards · Oct 14, 2026 | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | — | #1 · Co-SOTA · Coding › Agentic Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Web dev | #92 · #92 in Coding › Web dev Margin 85.04672897196262 LMArena leaderboard dataset · Oct 13, 2026 | #1 · SOTA · Coding › Web dev Margin 0 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #84 · #84 in Long context Margin 57.142857142857146 LMArena leaderboard dataset · Oct 13, 2026 | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | — | #4 · Near-SOTA · Vision Margin 13.15789473684211 Epoch AI benchmarking hub · Sep 22, 2026 |
| Factuality | #97 · #97 in Factuality Margin 73.13432835820896 LMArena leaderboard dataset · Oct 13, 2026 | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #78 · #78 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Oct 15, 2025 | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 |
Claude Haiku 4.5: $2.0000000000000004 per 1M blended tokens.
Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.
Claude Haiku 4.5: closed weights.
Claude Opus 5.5: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Haiku 4.5 in General LLM at #2 against #104.
Reasoning: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Haiku 4.5 in Reasoning at #1 against #91.
Science: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Haiku 4.5 in Science at #31 against #109.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Haiku 4.5 in Coding › Web dev at #1 against #92.
Long context: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Haiku 4.5 in Long context at #1 against #84.
Factuality: As of Oct 14, 2026, Claude Opus 5.5 leads Claude Haiku 4.5 in Factuality at #1 against #97.
Abstraction (ARC): As of Oct 14, 2026, Claude Opus 5.5 leads Claude Haiku 4.5 in Abstraction (ARC) at #1 against #78.
Claude Haiku 4.5 · Claude Opus 5.5
Claude Haiku 4.5 or Claude Opus 5.5?
As of Oct 14, 2026, Claude Haiku 4.5 leads Claude Opus 5.5 in 0 of 7 shared categories.
Claude Haiku 4.5 or Claude Opus 5.5 for General LLM?
As of Oct 14, 2026, Claude Opus 5.5 leads Claude Haiku 4.5 in General LLM at #2 against #104.
Claude Haiku 4.5 or Claude Opus 5.5 for Reasoning?
As of Oct 14, 2026, Claude Opus 5.5 leads Claude Haiku 4.5 in Reasoning at #1 against #91.
Claude Haiku 4.5 or Claude Opus 5.5 for Science?
As of Oct 14, 2026, Claude Opus 5.5 leads Claude Haiku 4.5 in Science at #31 against #109.